libraries/stringMb.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /** String Functions for phpMyAdmin
   4  *
   5  * If mb_* functions don't exist, we create the ones we need and they'll use the
   6  * standard string functions.
   7  *
   8  * All mb_* functions created by pMA should behave as mb_* functions.
   9  *
  10  * @package PhpMyAdmin
  11  */
  12 if (! defined('PHPMYADMIN')) {
  13     exit;
  14 }
  15
  16 if (!@function_exists('mb_ord')) {
  17     mb_internal_encoding('utf-8');
  18
  19     /**
  20      * Perform a regular expression match
  21      *
  22      * Take care: might not work with lookbehind expressions.
  23      *
  24      * @param string $pattern Pattern to search for
  25      * @param string $subject Input string
  26      * @param int    $offset  Start from search
  27      *
  28      * @return int 1 if matched, 0 if doesn't, false on failure
  29      */
  30     function mb_preg_strpos($pattern, $subject, $offset = 0)
  31     {
  32         $matches = array();
  33         $bFind = preg_match(
  34             $pattern, mb_substr($subject, $offset), $matches, PREG_OFFSET_CAPTURE
  35         );
  36         if (1 !== $bFind) {
  37             return false;
  38         }
  39
  40         return $matches[1][1] + $offset;
  41     }
  42
  43     /**
  44      * Get the ordinal value of a string
  45      *
  46      * @param string $string the string for which ord is required
  47      *
  48      * @return int the ord value
  49      */
  50     function mb_ord($string)
  51     {
  52         if (false === $string || null === $string || '' === $string) {
  53             return 0;
  54         }
  55
  56         $str = mb_convert_encoding($string, "UCS-4BE", "UTF-8");
  57         $substr = mb_substr($str, 0, 1, "UCS-4BE");
  58         $val = unpack("N", $substr);
  59         return $val[1];
  60     }
  61
  62     /**
  63      * Get the character of an ASCII
  64      *
  65      * @param int $ascii the ASCII code for which character is required
  66      *
  67      * @return string the character
  68      */
  69     function mb_chr($ascii)
  70     {
  71         return mb_convert_encoding(
  72             pack("N", $ascii),
  73             mb_internal_encoding(),
  74             'UCS-4BE'
  75         );
  76     }
  77
  78 }